bzr revid: qdp-launchpad@openerp.com-20121015114847-j2po052ckxtgegqc
check parent_id type constraint before create/write remove parent_id eval 0 bzr revid: al@openerp.com-20120912005721-ofpgkaorlm4zrwgy
bzr revid: marcelo@hakuna-20111202015929-d4tc2pvcf7h9qq6g